Power-loom



entre 'sra-...res ramena* serien.

ELIJAH HALL, OF ROCHESTER, NEWv YORK.

POWER-LOOM.

Specification of Letters Patent No.

To all 'whom 25 may concern Be it known that I, ELIJAH HALL, of the cityof Rochester, in the county of Monroe and State of New York, haveinvented a new and useful Improvement in Power- Looms; and I do herebydeclare that the following is a full, clear, and exact descrip` tion ofthe same, reference being had to the annexed dra-wings, forming part ofthis specification, in which- Figure l, is a vertical section of a powerloom in a plane parallel with the warp. Fig. 2, is another verticalsection transversely to the warp showing a back view of the lay, reedand their appendages. Fig. 8, shows one of the bolts for securing thereed detached from the loom.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists in certain means by which the reed is securedrigidly in the lay at the time of beating up the filling and also duringthe whole time that should be occupied by the flight of the shuttle, butfrom the time when the shuttle should have entered the shuttle box tillthe lay has nearly arrived at the end of its forward movement isliberated to such an extent that it will be caused to liberate itselfentirely and swing back if the shuttle should be obstructed in, or failto pass entirely through the warp, and will thereby prevent injury tot-he cloth which would otherwise occur.

To enable others skilled in the art to make and use my invention, I willproceed t0 describe its construction and operation.

A, is the lay which is driven in the usual manner by cranks O, andconnecting rods B, B.

D, is the reed which is hung by its top rail a, in the lay cap o, insuch a way that if the lower rail a', were free it might swing back. Thelower rail a', of the reed fits in a suitable recess in the back of thelay and is held there by means of a baro, which is connected by two armsd, d, with a small shaft e, fitted to suitable bearings under the lay.This shaft has a spiral spring f, applied to it, in such amanner as tohold the bar c, up against the back of the lower rail of the reed withsuflicient firmness to keep the reed steady in its place when it is notbeating up the filling or the shuttle is not passing in front of it, butas to allow the reed to swing back, and force back the bar c, in case ofthe shuttle being arrested in the 14,237, dated February 12, 1856.

warp and struck up by the reed. When this occurs the lower rail of thereed pushes back the bar 0, and passes it, and after it has passed, thebar c, is thrown forward by the spring, leaving the reed hanging quitefree behind it, so that as t-he lay continues to beat up no injury willbe done before the weaver has time to throw the loom out of gear.

The devices thus far described are substantially like devices which aredescribed in the specification of Letters Patent granted to me Sept.14th, 1850, and are only described here to explain my new invent-ion,the object of which is to lock the reed securely in the lay during theflight of the shuttle and at the time the filling is beaten up but topartly liberate it from the time the lay arrives at such a point in itsforward motion that the shuttle can be caught between the reed and thebeaten up filling at which time the shuttle should have entered the boxt-ill just before the forward movement of the lay terminates so that itmay swing back in case of the shutt-le failing -to enter the box at theproper time. This is effected by means of two upright sliding bolts g,g, working in st-aples it, t, and i, t', secured to the back of the layand of its swords y', j. One of these bolts is shown detached, see Fig.3. The bolts are connected at their lower ends by pivots p, p, lightrods la, 7c, and pivots g, g, to the connecting rods O, C, at somedistance behind the point n, of attachment to the lay. These rods 7c,7c, run upward in an oblique direction from the bolts to the connectingrods Ci, C. The vibrating movement of the connecting rods produced bythe driving cranks, imparts through the rods le, 7c, an upward anddownward movement to the bolts causing them to commence rising justbefore the lay commences to recede, and commence falling just before thelay commences to advance, the effect of which is that the bar c, isrigidly secured or locked by the upper ends of the bolts during theentire movement of the lay except from that point in its advance whent-he reed arrives near enough to the filling point t-o be obstructed bythe shuttle being left in the warp, till its forward movement has nearlyterminated, during which interval t-he upper ends of the bolts are drawnbelow the bar c, and the reed is unlocked, but just before the forwardmovement of the lay terminates the points of the bolts are raised highenough to catch the bar 0. This movement of the bolt is illustrated in Fig. l, where the lay is shown in two posit-ions, the positionrepresented in red outline being when the lay has just reached the pointin its movement where the shuttle should have passed into its box, andthe bolt just having been drawn below the bottom of the bar 0, and theposition shown in black outline being, when the lay has beaten up andthe points of the bolts have just risen high enough to catch and securethe reed. The bolts continue rising as the lay recedes until just as itsreceding movement is about to terminate when they commence theirdownward movement which continues till the lay has nearly finished itsforward movement.

This method of liberating and securing the reed is a substitute for theprotector, which I consider to be the greatest obstacle to thevery rapidoperation of the power loom, and this possesses the advantage over theprotector of allowing the loom to be driven at speed which is unlimitedexcept by the operation of other parts.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

Locking and unlocking the reed by means of sliding bolts g, g, appliedto the back of the lay behind the reed, and operated by connections withthe connecting rods B, B, by which the lay is driven, substantially asherein described.

ELIJAH HALL. Vitnesses:

M. U. NIEBERRY, JOHN 7. NIEBERRY.

